How do we know which reaction is oxidation and which o ne is

Last updated: 7/3/2023

How do we know which reaction is oxidation and which o ne is reduction Please explain 1 Which of the following is the cell reaction that occurs when the following half cells are combined E 0 54 V 1 2e 21 1 M Br 2e 2Br 1 M E 1 09 V a 2Br 1 Br 21 b 1 Br 21 2Br 21 Br 1 2Br d 21 2Br I Br Oxidation Reduction